umit Posted October 6, 2015 Report Share Posted October 6, 2015 i remember i went with school in my childhood to a illusion house there was a twisting spiral they asked to look for 10 sec and imeadedly look to the wal i saw the after image en twisting of the spiral in the wall for a sec buth the same did not happend for every body so can this be that we are sensetive to trigger hppd for who thiss illusion works? 2 Link to comment Share on other sites More sharing options...
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